package cn.wolfcode.util;

import cn.wolfcode.qo.JsonResult;
import com.alibaba.fastjson.JSON;
import org.apache.shiro.authz.UnauthorizedException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.method.HandlerMethod;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@ControllerAdvice
public class ControllerExceptionHandler {

    /*
    * RuntimeException e
    *  e.printStackTrace();
    *  可以将异常信息打印到控制台这个很重要不可以少
    * */

    @ExceptionHandler(RuntimeException.class)
    public String handleException(RuntimeException e, HandlerMethod handlerMethod, HttpServletResponse response) throws ServletException, IOException {
        //把异常信息打印出,方便我们开发的时候找bug
        e.printStackTrace();
        //判断当前执行的方法是否是ajax的方法(@ResponseBody)
        if(handlerMethod.hasMethodAnnotation(ResponseBody.class)){
            //如果是,则返回jsonresult
            JsonResult json = new JsonResult(false,"操作失败,请联系管理员!");
            //使用response对象输出数据(json字符串)
            response.setContentType("application/json;charset=utf-8");
            response.getWriter().print(JSON.toJSONString(json));
            return null;
        }
        //如果不是,则返回错误视图
        return "common/error";
    }



    //处理没有权限的异常
    @ExceptionHandler(UnauthorizedException.class)
    public String handleException7(RuntimeException e, HandlerMethod handlerMethod, HttpServletResponse response) throws ServletException, IOException {
        e.printStackTrace();
        if(handlerMethod.hasMethodAnnotation(ResponseBody.class)){
            JsonResult json = new JsonResult(false,"您没有权限");
            response.setContentType("application/json;charset=utf-8");
            response.getWriter().print(JSON.toJSONString(json));
            return null;
        }
        return "common/nopermission";
    }
}
